A suicide bomber blew himself up at an army checkpoint in northwest Pakistan on Sunday, killing one soldier and wounding two others, officials said.
Jawed Marwat, the top government official in South Waziristan, said the attack took place near Model Market in the Chakmalai area of South Waziristan along the Afghan border.
Two intelligence officials confirmed the account but said one soldier was killed and seven wounded. They said troops fired at the bomber as he approached on foot.
Marwat said the bombing was the second suicide attack in three days.
On Thursday, a suicide bomber attempted to blow himself up at a checkpoint in the village of Kotkai but soldiers shot and killed the man before he reached the army post, Marwat said. Two bystanders were lightly wounded.
The Pakistani army launched a military operation in South Waziristan in October 2009, and has repatriated more than 4,000 out of some 41,000 families from the Mehsud tribe who left the region to escape the violence.
Sunday's attack took place in an area where Mehsud tribes have been repatriated, and follows warnings from Pakistani Taliban militants telling families not to return.